﻿using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication1
{
    public partial class WebForm2 : System.Web.UI.Page
    {
        SqlHelper sqlHelper = new SqlHelper();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                BindGV();
            }
        }
        private void BindGV()
        {
            string sql = "select * from StudentInfo";
            GridView1.DataSource = sqlHelper.Get(sql, null);
            GridView1.DataKeyNames = new string[] { "stu_id" };
            GridView1.DataBind();
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            string name = Name.Text;
            string sql = "select * from StudentInfo where stu_name like '%'+@name+'%'";
            SqlParameter[] pars =
            {
                new SqlParameter("@name",name)
            };
            GridView1.DataSource = sqlHelper.Get(sql, null);
            GridView1.DataBind();
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            string name = Username.Text;
            string pass = Password.Text;
            string email = Email.Text;
            string introduce = Introduce.Text;

            string sql = "insert into StudentInfo (stu_name,password,email introduce) values(@name,@pass,@email,@introducr)";
            SqlParameter[] pars =
            {
                new SqlParameter("@name",name),
                new SqlParameter("@pass",pass),
                new SqlParameter("@email",email),
                new SqlParameter("@introduce",introduce)
            };
            if (SqlHelper.Execute(sql,pars))
            {
                BindGV();
            }
            else
            {
                Response.Write("注册失败!");
            }
        }

        protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            GridView1.EditIndex = e.NewEditIndex;
            BindGV();
        }

        protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            GridView1.EditIndex = -1;
            BindGV();
        }

        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            string id = GridView1.DataKeys[e.RowIndex].Value.ToString();
            string name = (GridView1.Rows[e.RowIndex].Cells[0].Controls[0] as TextBox).Text;
            string pass = (GridView1.Rows[e.RowIndex].Cells[1].Controls[0] as TextBox).Text;
            string email = (GridView1.Rows[e.RowIndex].Cells[2].Controls[0] as TextBox).Text;
            string introduce = (GridView1.Rows[e.RowIndex].Cells[3].Controls[0] as TextBox).Text;
            Response.Write($"{id}   {name}  {pass}  {email}  {introduce}");
        }

        protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            string id = GridView1.DataKeys[e.RowIndex].Value.ToString();
            string sql = "delete from StuInfo where stu_id=@id ";
            SqlParameter[] pars = 
            {
                new SqlParameter("@id",id)
            };
            if (SqlHelper.Execute(sql, pars))
            {
                Response.Write("删除成功!");
            }
            else
            {
                Response.Write("删除失败!");
            }
                BindGV();
        }
    }
}